{"id":"F2006B11389","name":"AD/MU-2/6 - Nose Landing Gear Actuator and Bracket Bolts - Replacement","slug":"ad-mu-2-6-nose-landing-gear-actuator-and-bracket-bolts-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57290,"registerId":"commonwealth-F2006B11389-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MU-2/6 - Nose Landing Gear Actuator and Bracket Bolts - Replacement","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Mitsubishi MU-2 Series Aeroplanes\n\n \n\nAD/MU-2/6 Nose Landing Gear Actuator and Bracket Bolts - Replacement\n\n\n9/72\n\n \n\nApplicability: All models.\n\n \n\nDocument: Mitsubishi MU-2 SB No. 155. Compliance:  As detailed in the requirement document.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused specifically on nose landing gear bolt replacement. It has not expanded beyond its original mechanical safety purpose."},"complexity_factors":["Extremely short document (under 200 words)","No defined terms section — relies entirely on external reference (Mitsubishi SB No. 155)","No conditional logic or exceptions — blanket applicability to 'All models'","Single compliance pathway referenced externally","No cross-references to other legislation beyond basic enabling regulation (CAR 1998 Part 39)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to all models of **Mitsubishi MU-2 aircraft**.\n\n**What it requires:**\n- Aircraft owners and operators must **replace specific bolts** on the nose landing gear actuator and bracket.\n- The exact replacement procedure is found in **Mitsubishi Service Bulletin No. 155** — the AD simply makes compliance with that bulletin legally mandatory.\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains a Mitsubishi MU-2 aeroplane in Australia.\n\n**Why it matters:**\n- Landing gear failures can be catastrophic. This directive addresses a specific mechanical defect or wear issue with these bolts to prevent potential nose landing gear collapse during takeoff or landing."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Based on the supplied text, there is no indication the AD's scope has been narrowed or broadened relative to its stated action. The directive applies to \"All models\" of the Mitsubishi MU-2 series and requires replacement per Mitsubishi MU-2 SB No. 155. The excerpt contains no amendments, exceptions, transitional arrangements, or countermanding provisions that would change the scope as presented."},"complexity_factors":["Reliance on an external technical document (Mitsubishi MU-2 SB No. 155) for all procedural and timing detail increases procedural dependency and forces consultees to read two documents rather than one.","No compliance timeframe, parts list, or technical steps appear in the AD excerpt, requiring implementers to obtain and interpret the service bulletin before acting.","Applicability to \"All models\" simplifies scope identification but increases logistical complexity for mixed fleets and operators with multiple aircraft variants.","Technical nature of the work (landing-gear actuator and bracket bolts) requires certified maintenance personnel and appropriate facilities, adding operational and scheduling complexity.","Regulatory enforcement and record-keeping obligations are implied by the AD but not detailed in the supplied text, creating potential uncertainty about acceptable evidence of compliance."],"plain_english_summary":"This AD mandates replacement of the nose landing‑gear actuator and bracket bolts on all Mitsubishi MU‑2 aircraft by requiring compliance with Mitsubishi MU‑2 Service Bulletin No. 155. It affects owners/operators and the maintenance organisations that must carry out the work. It’s important because compliance is compulsory under CASA rules, shifting technical detail to the manufacturer’s bulletin and obliging operators to bear cost, scheduling and record‑keeping to return aircraft to continuing airworthiness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-6-nose-landing-gear-actuator-and-bracket-bolts-replacement","history":"/api/acts/ad-mu-2-6-nose-landing-gear-actuator-and-bracket-bolts-replacement/history","analysis":"/api/acts/ad-mu-2-6-nose-landing-gear-actuator-and-bracket-bolts-replacement/analysis","conflicts":"/api/acts/ad-mu-2-6-nose-landing-gear-actuator-and-bracket-bolts-replacement/conflicts","importantCases":"/api/acts/ad-mu-2-6-nose-landing-gear-actuator-and-bracket-bolts-replacement/important-cases","documents":"/api/acts/ad-mu-2-6-nose-landing-gear-actuator-and-bracket-bolts-replacement/documents"}}